Back and forth and around and around he manipulated her clit and all the while, his prick got stiffer and stiffer, redder and redder.

Cindy closed her eyes and squirmed with excitement, her toes curling and uncurling as waves of excitement passed through her body. Sweat streamed from her forehead, matting her blonde hair at the temples.

Then she suddenly bucked up from the bed, her entire frame shaking with the violence of release. "Billy! Aaaaah!"

She fell back onto the bed, used up. "Billy, what happened? It-it was great!"

"You came," Billy said. He had already climbed up on the bed with her and had eased his hand between her thighs.

Before Cindy had a chance to come to her senses, he pushed her thighs apart and slid his prick up her leg so the cockhead pressed up against her little cunt hole.

When he pushed forward, a look of frustration crossed his face. His prick couldn't push past the tight muscles of her teeny fuck hole.

"Ouch! What are you doing?" Pain and alarm were etched on the girl's, face as she tried to move away from her brother.

"Hold still!" Billy growled. He clasped her shins in his hands, anchoring her to the bed.

Cindy's gaze fell on his prick, aimed right at her defenseless cunt hole, and terror filled her eyes. "Stop it! Stop it!"

Sally realized that Billy had gone much too far. She burst into the room, but just as she did, he reared back and rammed forward, shoving his prick halfway up his sister's virgin cunt.

"Auuugh!"

The girl's heart-rending cry filled the air. Bright blood poured out around Billy's prick, staining the bedspread.

"Billy, pull out – gently!" Sally commanded as she stepped up to the bed.

Billy was so startled at the sight of his blood spattered prick, that there was no more room for surprise when his mother's shrill voice cut the air.